| 摘要: |
| 在室内和田间测试了几种杀虫剂对麦蚜、天敌及后茬玉米田主要害虫与天敌种群的影响。结果表明，啶虫脒和吡虫啉对天敌瓢虫和麦蚜的选择性最高，对捕食性天敌杀伤率小，对麦蚜防治效果好，且田间连续多年使用吡虫啉防治麦蚜对后茬玉米田天敌和害虫种群影响相对较小；其次是抗蚜威对天敌和麦蚜的选择性较高；另外，赛丹对天敌和麦蚜也具有一定的选择性；氧化乐果和杀灭菊酯对天敌不具选择保护作用，在防治麦蚜的同时大量杀伤天敌，同时显著降低后作玉米田天敌的数量和益害比。 |
| 关键词: 杀虫剂 麦蚜 天敌 选择性 |
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| 基金项目:国家“九五”攻关项目子专题“陕西关中麦区主要病虫害综合防治技术研究”(96-005-02-02) |
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| Effect of pesticides on wheat aphids and their natural enemies in wheat fields as well as on pests and natural enemies in maize fields |
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| Abstract: |
| The effect of several pesticides on wheat aphids and their natural enemies as well as on pests and natural enemies population in maize field was tested indoors and in the field.The results showed that acetaniprid and imidacloprid had the best selection to natural enemies （ladybird） and wheat aphids，and was of good effect to control wheat aphid，but the killing rate was lower to predacious natural enemies.After many year’s application of imidacloprid to control wheat aphid，its effect on maize natural enemies and pest population was relatively low.The selection of Pirimicarb to natural enemies and wheat aphids was high；The thiodan had some selection to ladybird and wheat aphids.Omethoate and fenvalerate had no selective protection to ladybird，many of the natural enemies were killed when they were used to control wheat aphid and the number of natural enemies was significantly decreased,the ratio of benefit insect to pest of maize was lowered too in fields. |
| Key words: insecticide wheat aphid natural enemies selectivity |
